Abstract
Since the beginning of the Solar Terrestrial Relations Observatory (STEREO) mission at the end of 2006, the two spacecraft have now separated by more than 130 ∘ degrees from the Earth. A 360-degree view of the Sun has been possible since February 2011, providing multipoint in situ and remote sensing observations of unprecedented quality. Combining STEREO observations with near-Earth measurements allows the study of solar energetic particle (SEP) events over a wide longitudinal range with minimal radial gradient effects. This contribution provides an overview of recent results obtained by the STEREO/IMPACT team in combination with observations by the ACE and SOHO spacecraft. We focus especially on multi-spacecraft investigations of SEP events. The large longitudinal spread of electron and 3He-rich events as well as unusual anisotropies will be presented and discussed.
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Acknowledgments
The STEREO/SEPT and SOHO/EPHIN projects are supported under Grant 50 OC 1302 by the German Bundesministerium für Wirtschaft through the Deutsches Zentrum für Luft- und Raumfahrt (DLR). R. Gómez-Herrero acknowledges financial support by the Spanish MINECO under project AYA2012-39810-C02-01. The work at Caltech was supported by NASA grants NNX13AH66G, NNX11A075G, and NNX10AQ68GS03 by NASA contract NAS5-03131 and by NSF grant 1156004.
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Dresing, N., Cohen, C.M.S., Gómez-Herrero, R. et al. Approaching Solar Maximum 24 with STEREO—Multipoint Observations of Solar Energetic Particle Events. Braz J Phys 44, 504–511 (2014). https://doi.org/10.1007/s13538-014-0227-5
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DOI: https://doi.org/10.1007/s13538-014-0227-5